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Old 02-18-2012, 04:17 PM   #1 (permalink)
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How JAGUAR did aerodynamics

...some interesting reading and pictures here:

Concepts and prototypes : Jaguar XJ21 | AROnline

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Old 02-18-2012, 04:49 PM   #2 (permalink)
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Cd

I did a speed-read through the article.Didn't see any drag data.
The original 1969 Datsun(Nissan) 240 Z had Cd 0.546.
The original E Type was estimated @ Cd 0.45.
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Old 02-18-2012, 07:54 PM   #3 (permalink)
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Quote:
Originally Posted by aerohead View Post
I did a speed-read through the article.Didn't see any drag data.
The original 1969 Datsun(Nissan) 240 Z had Cd 0.546.
The original E Type was estimated @ Cd 0.45.
It's so weird how such sporty looking cars back in the day had terrieble Cd, the newer SUV's have a better Cd than the 240z
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Old 02-20-2012, 12:12 AM   #4 (permalink)
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Nice read, thanks. Just today saw an XJS in Robstown, TX at the truckstop.
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Old 02-20-2012, 01:05 AM   #5 (permalink)
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Quote:
Originally Posted by aerohead View Post
I did a speed-read through the article.Didn't see any drag data.
The original 1969 Datsun(Nissan) 240 Z had Cd 0.546.
The original E Type was estimated @ Cd 0.45.
Are you sure of that 240Z Cd figure?
I've seen 0.465 or 0.467 quoted before, but nothing that high.
At least Datsun tried harder with the 280zx, it's usually quoted as 0.385
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Old 02-20-2012, 11:53 PM   #6 (permalink)
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If I did my math right this site cites the S30 Fairlady at 0.396 Cd.

Nissan Fairlady Z S30 2.4 (1969) - technical specifications of 1969 Nissan Fairlady Z S30 2.4

This says "4", which I take as 0.4 Cd.

http://www.autospecs.info/CarSpecs/1...fairlady-z-s30

Man, those Brits had some uuuuugly car designs. Good they stuck with the XKE.
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Old 02-21-2012, 12:29 AM   #7 (permalink)
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Jaguar had as many misses with their aero work as they did hits.

The C type overheated and all cars failed to finish at Le Mans. The D type did better.
The E type had a number about equal to a VW Kombi bus...around .45 as mentioned above.
The early XJ's did little better with .41 but the number was quoted with so many "adjustments" is was virtually meaningless.

The managed somewhat better after ditching Malcom Sayer and getting people under Ford's management who actually knew what they were doing.

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Old 02-21-2012, 07:08 PM   #8 (permalink)
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weird

Quote:
Originally Posted by GRU View Post
It's so weird how such sporty looking cars back in the day had terrieble Cd, the newer SUV's have a better Cd than the 240z
No kidding! Most cars,vans,and SUVs today have lower Cds than the Corvette had when I was in college.
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Old 02-21-2012, 07:22 PM   #9 (permalink)
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No kidding! Most cars,vans,and SUVs today have lower Cds than the Corvette had when I was in college.
Fortunately we can still bash them with their enormous frontal area.

I love my 280Z.

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Old 02-24-2012, 05:33 AM   #10 (permalink)
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Quote:
Originally Posted by D.O.G. View Post
Are you sure of that 240Z Cd figure?
I've seen 0.465 or 0.467 quoted before, but nothing that high.
At least Datsun tried harder with the 280zx, it's usually quoted as 0.385
I second that figure based on several sources.
Datsun/Nissan actually performed water tunnel testing on the 240Z .

I used to have a Z car and it was like slamming on the brakes every time I tried to coast in that car. Absolutely horrible aerodynamics for such a sleek looking design.

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